The grip in your hand is pretty ok since it has raised lines on the back and around the side, but it’s more of a hard plastic than a grippy rubber, so it can slide around on slippery surfaces. Regardless I’ve used one for a long time now over multiple phones. I just ordered a Cat Tongue grip? from Amazon for it, it’s basically a textured/rubbery sticker that goes on the back. Obviously isn’t 100% flat on the case due to the aforementioned raised lines, but is sticking ok so far. I do worry about how long it’ll last stuck on though, as there is probably a good possibility that the edges of the sticker catches on something – pocket, pouch, etc. at some point.